Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 154
through a field that tends to reverse thedirection of the current. Since the coil is already in such a 366 HAWKINS ELECTRICITY field, the act of commutation must take place before it passesout of this field. Accordingly, a negative lead must be giventhe brushes. Method of Starting a Motor.—Although… … Fig. 414.—Railway motor. This type of motor, since it must operate under cars, has takenon the peculiar form under which it is most familiar. As illustrated, the case is of suchshape that compactness and water proofing are secured, and the means of attachmentto the car axle and support from the…
Electrical engineering
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